[feature] Liif rdn

[Yshuo-Li]

No description provided.

[innerlee]

@Yshuo-Li the failing CI is genuine. Pls have a check.

[codecov]

Codecov Report

Merging #440 (b94015a) into master (2e7f0c8) will increase coverage by 0.05%.
The diff coverage is 100.00%.

❗ Current head b94015a differs from pull request most recent head 3190bec. Consider uploading reports for the commit 3190bec to get more accurate results

@@            Coverage Diff             @@
##           master     #440      +/-   ##
==========================================
+ Coverage   80.84%   80.90%   +0.05%     
==========================================
  Files         189      189              
  Lines       10101    10121      +20     
  Branches     1485     1487       +2     
==========================================
+ Hits         8166     8188      +22     
+ Misses       1721     1720       -1     
+ Partials      214      213       -1     

Flag	Coverage Δ
unittests	80.87% <100.00%> (+0.04%)	⬆️

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Impacted Files	Coverage Δ
mmedit/core/misc.py	100.00% <100.00%> (ø)
mmedit/models/backbones/__init__.py	100.00% <100.00%> (ø)
mmedit/models/backbones/sr_backbones/__init__.py	100.00% <100.00%> (ø)
mmedit/models/backbones/sr_backbones/liif_net.py	87.59% <100.00%> (+2.27%)	⬆️
...ls/components/stylegan2/generator_discriminator.py	86.14% <0.00%> (+1.20%)	⬆️

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